ECG peaks Flashcards
1
Q
Calculate heart rate
A
Count big squares = x
Divide 300 by x
2
Q
P wave
A
Depolarisation of the atrium
3
Q
Q wave
A
Depolarisation of the septum
4
Q
R wave
A
Depolarisation of the ventricular walls
5
Q
S wave
A
Depolarisation of the purkinje fibres
6
Q
T wave
A
Repolarisation of the ventricles
7
Q
U wave
A
Rarely seen
8
Q
ST segment
A
Time between end of ventricle depolarisation and start of repolarisation
9
Q
QT interval
A
Total time for depolarisation and repolarisation of the ventricles
10
Q
PR interval
A
Conduction time through the SAN. Time between atrial depolarisation and ventricular depolarisation
11
Q
QRS complex length
A
2-3 small squares
each small square = 0.04 seconds
12
Q
PR interval length
A
3-5 small squares
0.12 - 0.2 seconds
